The Cudy WU1400 is an AC1300 class high-gain Wi-Fi adapter that provides wireless network connectivity for desktop and laptop computers. With a USB-A 3.0 interface, it achieves high data transfer speeds, offering up to 400 Mbps on the 2.4 GHz band and 867 Mbps on the 5 GHz band, for a total bandwidth of 1267 Mbps. Its high-gain antenna (detachable or fixed) boosts signal strength. It supports Wi-Fi 5 (802.11ac) and MU-MIMO technology on the 5 GHz band for simultaneous data transmission to multiple devices. Technical features include 256-QAM modulation and 80 MHz channel width support. Compatible with Windows 7/8/8.1/10/11, macOS 10.5~10.13, and Linux kernel 2.6.24~5.x; drivers install automatically on Windows 10/11. Operating temperature range: 0°C to 40°C. Certifications: FCC, CE. Version 1.0 dimensions: 213×23×10 mm, weight 25.3 g; version 2.0 dimensions: 222×20×15 mm, weight 18.7 g. This adapter is ideal for desktop PCs without built-in Wi-Fi or users with weak wireless connections. It easily plugs into a USB 3.0 port and provides stable performance for high-bandwidth tasks like HD video streaming, online gaming, and large file downloads. It is also a practical solution for upgrading older laptops' Wi-Fi capabilities or improving signal in weak areas. Technical Specifications: - Model: WU1400 - Wi-Fi Standard: Wi-Fi 5 (802.11ac) - 5 GHz Speed: 867 Mbps - 2.4 GHz Speed: 400 Mbps - Number of Antennas: 1 (Detachable or Fixed) - Interface: USB-A 3.0 - Maximum Modulation: 256-QAM - Maximum Channel Width: 80 MHz - MU-MIMO: Available on 5 GHz - Wi-Fi Security: WPA/WPA2/WPA3 - Dimensions: 213×23×10 mm (1.0) / 222×20×15 mm (2.0) - Weight: 25.3 g (1.0) / 18.7 g (2.0) - Compatible Operating Systems: Windows 7/8/8.1/10/11, macOS 10.5~10.13, Linux 2.6.24~5.x - Operating Temperature: 0°C ~ 40°C - Certifications: FCC, CE